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S.S. class Mr. Gavin

Jacqueline Murphy

on 23 May 2013

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Transcript of Drought

Drought When does this take place? Characteristics... What is a Where do they occur? What create/cause these? A drought is a prolonged period of abnormally low precipitation; a shortage of water resulting from this. It is a reoccurring natural disaster that can hurt are economy, and food supply. During a drought water may become scares. It can also affect farms by causing dust bowls. It is when the wind blows away parts of the crop away into other areas. Because the soil in the area is not damp enough. drought? This usually occurs when a region receives consistently below average precipitation. Generally,
rainfall is related
to the atmosphere
combine with the upward forcing of the air mass containing that water vapors. These factors do not support precipitation volumes sufficent to reach the surface, the result is a drought Whats the impact on humans and their properties? How do people prepare for droughts? Thanks for listening! :) It can have a
substantial effect on the
ecosystem and agriculture
of the affected region. Drought is a normal, recurring feature of the climate in most parts of the world. Biblography- ___________ http://en.wikipedia.org/wiki/Drought#Types Here are some are some ways Wikipedia says you can prepare for droughts: Dams - many dams and their associated reservoirs supply additional water in times of drought.
Cloud seeding - an artificial technique to induce rainfall.

Drought monitoring - Continuous observation of rainfall levels and comparisons with current usage levels can help prevent Desalination of sea water for irrigation or consumption. man-made drought. For instance, analysis of water usage in Yemen has revealed that their water table (underground water level) is put at grave risk by over-use to fertilize their Khat crop.[50] Careful monitoring of moisture levels can also help predict increased risk for wildfires, using such metrics as the Keetch-Byram Drought Index[9] or Palmer Drought Index. Land use - Carefully planned crop rotation can help to minimize erosion and allow farmers to plant less water-dependent crops in drier years.
Outdoor water-use restriction - Regulating the use of sprinklers, hoses or buckets on outdoor plants, filling pools, and other water-intensive home maintenance tasks.
Rainwater harvesting - Collection and storage of rainwater from roofs or other suitable catchments.
Recycled water - Former wastewater (sewage) that has been treated and purified for reuse.
Transvasement - Building canals or redirecting rivers as massive attempts at irrigation in drought-prone areas. the horn of Africa; Cities near the Himalayan rivers in India, China, Pakistan, Bangladesh, Nepal, and Myanmar; East Africa; and Etc. Droughts usually happen in dryer areas such as: By:
Jacqueline Murphy
& Michal Menzen The characteristics
of a drought are: a reduced amount of water,
a low or none existing amounts of vegetation, and
in extreme case- not much life. Because of the low amount of vegetation, animals usually don't have much food to get the nutrition needed to live
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